Mark Roberts wrote:
I've never heard a good word about Norton AV. But I'd try Marnie's suggestion about re-seating the video card and Cory's about checking for new drivers, too.
Regardless of anything else you do, take NAV out of the troubleshooting equation. You can put it back in later if you insist, but get rid of it until you isolate the fault. In my experience, NAV not only creates problems, it exacerbates those that exist elsewhere.
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